# Multi-stage build for TypeScript Node.js backend
FROM node:20-alpine AS builder

WORKDIR /app

# Copy package files
COPY package*.json ./
COPY tsconfig.json ./

# Install dependencies (including dev dependencies for build)
RUN npm ci

# Copy source code
COPY . .

# Build TypeScript
RUN npm run build

# Production stage
FROM node:20-alpine AS production

WORKDIR /app

# Install production dependencies only
COPY package*.json ./
RUN npm ci --only=production && npm cache clean --force

# Copy built files from builder
COPY --from=builder /app/dist ./dist

# Copy source route files for Swagger JSDoc (needs TS comments for documentation)
COPY --from=builder /app/src/routes ./src/routes

# Create non-root user for security
RUN addgroup -g 1001 -S nodejs && \
    adduser -S nodejs -u 1001

# Change ownership
RUN chown -R nodejs:nodejs /app

USER nodejs

# Expose port (Hugging Face Spaces uses 7860 by default)
EXPOSE 7860

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD node -e "require('http').get('http://localhost:7860/health', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})"

# Start the application
CMD ["node", "dist/server.js"]